Low activity and seasonal change in population size structure of grenadiers in oligotrophic abyssal North Pacific Ocean

Imants George Priede, A. R. Deary, David Mark Bailey, K. L. Smith

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Analysis of video recordings of swimming, in abyssal grenadiers Coryphaenoides. spp. revealed site differences in tail-beat frequencies. At the highly oligotiophic deep central North Pacific (CNP: 5800 m depth) station fishes had significantly lower tail-beat frequencies (0.73 +/- 0.02 Hz. mean +/- S.E.) than fishes of similar size at the shallower 'Station F' (Sta. F: 4400m depth) beneath the more productive waters of the California Current Upwelling (1.06 +/- 0.04 Hz). These behavioural differences may be evidence for the proposed physiological adaptations of Coryphaenoides armatus and Coryphaenoides yaquinae, to different depths and food supply levels. At CNP. smaller fishes (38.9cm mean L-T) were present in autumn than in summer, (59.4cm L-T) suggesting large-scale migrations across the abyssal ocean floor despite the observed slow swimming speeds. (C) 2003 The Fisheries Society of the British Isles.

Original languageEnglish
Pages (from-to)187-196
Number of pages9
JournalJournal of Fish Biology
Volume63
DOIs
Publication statusPublished - 2003

Keywords

  • behaviour
  • Coryphaenoides
  • deep water
  • physiology
  • swimming
  • DEEP-SEA
  • CORYPHAENOIDES-ARMATUS
  • CHEMICAL-COMPOSITION
  • OXYGEN-CONSUMPTION
  • FOOD AVAILABILITY
  • SCAVENGING FISHES
  • HAWAIIAN-ISLANDS
  • SELECTIVE FACTOR
  • MIDWATER FISHES
  • ATLANTIC-OCEAN

Cite this

Low activity and seasonal change in population size structure of grenadiers in oligotrophic abyssal North Pacific Ocean. / Priede, Imants George; Deary, A. R.; Bailey, David Mark; Smith, K. L.

In: Journal of Fish Biology, Vol. 63, 2003, p. 187-196.

Research output: Contribution to journalArticle

Priede, Imants George ; Deary, A. R. ; Bailey, David Mark ; Smith, K. L. / Low activity and seasonal change in population size structure of grenadiers in oligotrophic abyssal North Pacific Ocean. In: Journal of Fish Biology. 2003 ; Vol. 63. pp. 187-196.
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abstract = "Analysis of video recordings of swimming, in abyssal grenadiers Coryphaenoides. spp. revealed site differences in tail-beat frequencies. At the highly oligotiophic deep central North Pacific (CNP: 5800 m depth) station fishes had significantly lower tail-beat frequencies (0.73 +/- 0.02 Hz. mean +/- S.E.) than fishes of similar size at the shallower 'Station F' (Sta. F: 4400m depth) beneath the more productive waters of the California Current Upwelling (1.06 +/- 0.04 Hz). These behavioural differences may be evidence for the proposed physiological adaptations of Coryphaenoides armatus and Coryphaenoides yaquinae, to different depths and food supply levels. At CNP. smaller fishes (38.9cm mean L-T) were present in autumn than in summer, (59.4cm L-T) suggesting large-scale migrations across the abyssal ocean floor despite the observed slow swimming speeds. (C) 2003 The Fisheries Society of the British Isles.",
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KW - CHEMICAL-COMPOSITION

KW - OXYGEN-CONSUMPTION

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KW - HAWAIIAN-ISLANDS

KW - SELECTIVE FACTOR

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